Lunch bag



FIG. 1 is a perspective view of a lunch bag, showing my new design;

FIG. 2 is a front view of the lunch bag;

FIG. 3 is a rear view of the lunch bag;

FIG. 4 is a left side view of the lunch bag;

FIG. 5 is a right side view of the lunch bag;

FIG. 6 is a top view of the lunch bag; and,

FIG. 7 is a bottom view of the lunch bag.

The broken lines throughout the drawing figures depict environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a lunch bag, as shown and described. 